salmson SIE, Инструкции по установке и запуску, Страница: 70 / 272

English
64 Pompes Salmson 04/2012
6.4 Dual pump function NOTE
The properties described below are only available if the internal MP
interface (MP = Multi Pump) is used.
• Both pumps are controlled by the master pump.
If one of the pumps malfunctions, the other will run according to the
master's control settings. In case of a total failure of the master, the
slave pump operates at emergency operation speed.
The emergency operation speed can be set in menu <5.6.2.0> (see
Section 6.4.3 “Operation during interruption of communication” on
page 66).
• The master's display will show the status of the double pump. On the
slave display, 'SL' will appear.
• The master pump is the pump on the left by direction of flow. Connect
the differential pressure sensor to this pump.
The measuring points of the differential pressure sensor of the master
pump must be on the suction and pressure side of the double-pump
system in the corresponding collector pipe (Fig. 12).
InterFace module (IF-Module) For communication between pumps and the building management
system, one IF-Module (accessories) is required per pump. This is
plugged into the terminal space (Fig. 1).
• The master-slave communication uses an internal interface (terminal:
MP, Fig. 21).
• In double pumps, only the master pump has to be equipped with an
IF-Module.
NOTE
The procedure and further information for commissioning and confi-
guring the IF-Module on the pump can be found in the installation and
operating instructions of the IF-Module used.
6.4.1 Operating modes
Main/readiness operation Each of the two pumps provides the configuration flow rate. The
other pump is available in case of malfunction or runs after pump
cycling. Only one pump runs at a time (see Fig. 10, 11 and 12).
Parallel operation In the partial load range, the hydraulic output is provided at the
beginning by one pump. The second pump will be switched on when
it is most effective to do this, i.e. when the total power consumption
P
1
of both pumps in the partial load range is less than the power con-
sumption P
1
of one pump. Both pumps will then be simultaneously
adjusted upwards to the maximum speed. (Fig. 14 and 15).
In manual control mode, both pumps always run synchronously.
Fig. 13: Example, DDG connection
Communication Master pump Slave pump
PLR/interface converter IF-Module PLR
No IF-Module
necessary
LONWORKS network IF-Module LON
No IF-Module
necessary
BACnet BACnet IF-Module
No IF-Module
necessary
Modbus Modbus IF-Module
No IF-Module
necessary
CAN bus CAN IF-Module
No IF-Module
necessary
Fig. 14: Δ p-c control (parallel operation)
Q
s
H
m a x
H
H
s
H
min